Summary: Supporting Online Materials
The Potential for Earthquake Early Warning in Southern California
By Richard M Allen and Hiroo Kanamori,
Materials and Methods
The recursive relation (equations 1-3) provides an estimate of the frequency content of a
waveform. The approach is based on the fact that for a harmonic signal x(t) with
angular frequency ,
2
2
2
x
dt
dx






= (6)

Source: Allen, Richard M. - Seismological Laboratory, Department of Earth and Planetary Science, University of California at Berkeley

Collections: Geosciences